1244064666 has 32 divisors (see below), whose sum is σ = 2713455360. Its totient is φ = 377941824.

The previous prime is 1244064659. The next prime is 1244064677. The reversal of 1244064666 is 6664604421.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94785 + ... + 107108.

It is an arithmetic number, because the mean of its divisors is an integer number (84795480).

Almost surely, 2^1244064666 is an apocalyptic number.

1244064666 is an abundant number, since it is smaller than the sum of its proper divisors (1469390694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1244064666 is a wasteful number, since it uses less digits than its factorization.

1244064666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201990.

The product of its (nonzero) digits is 165888, while the sum is 39.

The square root of 1244064666 is about 35271.3008832960. The cubic root of 1244064666 is about 1075.5096673918.

The spelling of 1244064666 in words is "one billion, two hundred forty-four million, sixty-four thousand, six hundred sixty-six".